Mr. Clark served as Chief Executive Officer and Director of Genentech Inc (part of the Roche Group) and Head of North American Commercial Operations for Roche until December 31, 2016, having held several senior strategy, operations and commercially focused roles since joining Genentech in 2003.

Prior to this Mr. Clark held various senior operational, sales and marketing roles in other pharmaceutical and healthcare companies.

He is currently appointed as a Non-Executive Director of TerraVia Holdings Inc. where he serves as Chairman of the Compensation Committee and as a member of the Nominating and Corporate Governance Committee.